Ouch! Glad you're OK and don't worry, the shorts should wash out. Had a co-worker remind me of that a couple of years ago, the bruise he had you could almost see the end grain in the print on his stomach. He had never been told to stand to one side of the work and not behind it. Only time I ever got a kick back was on a saw like you described, had to set the fence front and back (typical older craftsman).
To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault